W1209 Digital DC12V Temperature Controller Module

Discover the power of precise temperature control with the W1209 Digital DC12V Temperature Controller Module. This cost-effective, user-friendly digital thermostat module is engineered for a wide range of temperature control applications. It comes equipped with an NTC temperature sensor, relay output, digital display, and control buttons, offering automatic device switching based on temperature readings.

🔧 Technical Specifications

• Power Supply: 12V DC
• Temperature Range: -50°C to +110°C
• Accuracy: ±0.1°C
• Sensor Type: NTC 10K 3950 waterproof probe
• Relay Output: 1-channel relay, supports up to 250V AC / 10A or 14V DC / 10A
• Display: 3-digit 7-segment LED display (shows temperature in °C)
• Adjustable Parameters:
  • P0: Working mode (Heating / Cooling)
  • P1: Hysteresis setting (temperature difference)
  • P2: Maximum temperature limit
  • P3: Minimum temperature limit
  • P4: Temperature calibration
  • P5: Relay delay time
  • P6: High-temperature alarm

🎯 Typical Applications

• Incubators
• Aquariums
• Temperature-controlled fans
• Pet heaters
• Greenhouse heating/cooling systems
• DIY refrigerators or heaters

🔌 Wiring Instructions

• VCC (+12V) → Power supply input
• GND → Ground
• Relay Output Terminal (3 pins): COM (Common), NO (Normally Open), NC (Normally Closed)

Typically, the COM and NO terminals are used. When the set temperature condition is met, the relay switches between these terminals.

⚠️ Safety Precautions

• If controlling high-power devices, consider adding protection (fuse, contactor, etc.).
• Works only with 12V DC. Using other voltages may damage the module.
• Do not exceed the relay’s rated current/voltage.